Improvement in bars for making horseshoes



UNITED `STATES PATENT OFFICE.

THOMAS THISTLEWOOD, OF SPARTA, WISCONSIN, ASSIGNOR OF ONE-HALF HIS RIGHTTO L. M. NEWBURY, OF SAME PLACE.

IMPROVEMENT4 IN BARS FOR MKING'HORSESHOES.

Specicat-ion forming part of Letters Patent No. 173,517, dated February15, 18,76; application filed February 7, 1874.

To all whom it may concern y Beit known that I, THOMAS THIsTLEWooD, ofSparta, in the county of Monroe and State of Wisconsin, have invented anew and useful Improvement in Horseshoes, of which the following is a.specification My invention consists of an improved method of makinghorseshoe-iron, for the purpose of making shoes with selfsharpeningcalks therefrom.

My improved bar of horseshoe-iron is made' as follows: take two bars ofiron, C and D, Fig. 2, and place between them a bar of steel, E, andthen roll them all together at Weldingheat so as to form a single barhaving an iron sides of the calks wears away by use faster than theharder steel center, or point ofthe calk 5 also, the' nail-holes and theshoe itself are stronger and less liable to wear or break on account ofthe greater strength and hardness of the steel. In cutting old shoesthus made, to t a smaller foot, the steel will always form the point ofthe new ealk, which will be self-sharpening.

Iam aware that compound bars of horseshoeiron have been made in severalWays by rolling bars of iron and steel together, but I believe it is newto make a bar of horseshoeiron by rolling a single bar of steel betweentwo bars of iron, as above described; and also new to makeself-sharpening shoes-or calks therefrom.

Having thus described and limited my invention, I clailni A barofhorseshoe-iromlavingn steel center between two iron surfaces,substantially as set forth. v

v p THOMAS THISTLEWOOD.

Witnesses:

WM. H. BLYTON,

E. H. CANFIELD.

